import Vue from 'vue'
import VueRouter from 'vue-router'
import login from '../components/login.vue'
import home from '../components/home.vue'
import welcome from '../components/Welcome.vue'
import Users from '../components/user/Users.vue'
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles'
Vue.use(VueRouter)

const routes = [
    // redirect 当页面访问/时，重定向到login页面
    { path: '/', redirect: '/login' },
    { path: '/login', component: login },
    {
        path: '/home',
        component: home,
        redirect: '/welcome',
        children: [
            { path: '/welcome', component: welcome },
            { path: '/users', component: Users },
            { path: '/rights', component: Rights },
            { path: '/roles', component: Roles },

        ]
    },

]
const router = new VueRouter({
        routes
    })
    // 挂在路由导航守卫
router.beforeEach((to, from, next) => {
    // to 将要访问的路径
    // from 代表从哪个路径跳转而来
    // next 是一个函数 表示放行
    // next() 放行next('/login') 强制跳转
    if (to.path === '/login') return next();
    // 获取token
    const tokenStr = window.sessionStorage.getItem('token')
    if (!tokenStr) return next('/login')
    next()
})
export default router